King Abdullah, Custodian of the Two Holy Mosques, has ordered an air ambulance be sent to Niger to transfer the bodies of four Saudi tourists who were killed when gunmen opened fire at them in an attack in Niger on Monday. The attack left five others seriously injured, according to a Saudi embassy official. The Saudis were on a hunting safari, said Osama Nuqali, director of media at the Saudi Embassy in Niger. The crime is believed to be motivated by robbery, he said. The gunmen targeted the tourists as they stopped for their morning prayers, a Niger security source said. Three Saudis died at the scene and the fourth was pronounced dead at the hospital, Nuqali added. The air ambulance will also transfer the injured to the Kingdom Tuesday. The group of Saudi tourists was accompanied by two Malian guides. __